Is 1975 is a composite number or not ?
- As we already know that, the number having factors 1 and the number itself is the prime number.
- And numbers having more than these two factors are the composite numbers.
- To check whether the number 1975 is composite or not first we have to find its factors.
Contents
Factors of 1975:
- If we have taken numbers from 1, 2, 3…for checking factors of 1975, we found that 1975 has factors 1, 5, 25, 79, 395 and 1975. Hence, we must say that 1975 is a composite number.
- Thus, 1975 is the composite number.
- If we multiply 1975 by 1, 2, 3 then we get the multiples of 1975 which are 1975, 3950 and so on.
1975 is a Composite number or Prime number
About the number 1975:
- 1975 has more than two factors which are 1, 5, 25, 79, 395 and 1975 and hence it is the composite number.
- 1975 is the odd composite number and it is not the perfect square also.
- If we divide 1975 by 1, 5, 25, 79, 395 and 1975 then we get remainder as zero. Hence, 1, 5, 25, 79, 395 and 1975 are the factors of 1975
Note:
- 1975 is not the perfect square.
- Factors of 1975: 1, 5, 25, 79, 395 and 1975
- Prime factors of 1975: 5, 79
Conclusion:
- 1975 is the composite number which has factors 1, 5, 25, 79, 395 and 1975.
- And hence, 1975 is not the prime number.
Multiple Choice Questions:
1) 1975 is a
a) Even number
b) Prime number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The non-prime factors of a composite number 1975 are
a) 1
b) 5, 79
c) 1, 25, 395 and 1975
d) 1, 5, 25, 79, 395 and 1975
Ans: c) 1, 25, 395 and 1975
3) 1975 is the odd composite number because
a) It has factors 1, 5, 25, 79, 395 and 1975
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all